[TomGuy]

How to stop that Candy moderator from talking over Romney?

The first time she 'interjects' into the debate, Romney (or Obama) should just say to her and the audience that 'this is a townhall where the people, not the moderator, asks the questions' and then ignore her injection/question.

[rurgan]

Yes and call her out for media bias.

Romney needs to do a preemptive strike against media bias . His opening line should include:”If you Candy Crowly interrupt me or allow Obama to interrupt me , if the questions you picked are gotcha questions against me then you prove the media is biased to the American people” and every time Candy interrupts him , he should call her out for media bias.